scholarly journals Near-field three-terminal thermoelectric heat engine

2018 ◽  
Vol 97 (12) ◽  
Author(s):  
Jian-Hua Jiang ◽  
Yoseph Imry
Keyword(s):  
Near Field ◽  
Heat Engine ◽  
Thermoelectric Heat

scholarly journals A Thermoelectric Heat Engine with Ultracold Atoms

Science ◽  
2013 ◽  
Vol 342 (6159) ◽  
pp. 713-715 ◽  
Author(s):  
J.-P. Brantut ◽  
C. Grenier ◽  
J. Meineke ◽  
D. Stadler ◽  
S. Krinner ◽  
...  
Keyword(s):  
Ultracold Atoms ◽  
Heat Engine ◽  
Thermoelectric Heat

Optimal Quantum Interference Thermoelectric Heat Engine with Edge States

2017 ◽  
Vol 118 (25) ◽  
Author(s):  
Peter Samuelsson ◽  
Sara Kheradsoud ◽  
Björn Sothmann
Keyword(s):  
Quantum Interference ◽  
Heat Engine ◽  
Edge States ◽  
Thermoelectric Heat

scholarly journals Superconducting nonlinear thermoelectric heat engine

2020 ◽  
Vol 101 (21) ◽  
Author(s):  
G. Marchegiani ◽  
A. Braggio ◽  
F. Giazotto
Keyword(s):  
Heat Engine ◽  
Thermoelectric Heat

scholarly journals Power, Efficiency and Fluctuations in a Quantum Point Contact as Steady-State Thermoelectric Heat Engine

Entropy ◽  
2019 ◽  
Vol 21 (8) ◽  
pp. 777 ◽  
Author(s):  
Sara Kheradsoud ◽  
Nastaran Dashti ◽  
Maciej Misiorny ◽  
Patrick Potts ◽  
Janine Splettstoesser ◽  
...  
Keyword(s):  
Steady State ◽  
Power Efficiency ◽  
Heat Engine ◽  
Point Contact ◽  
Power Production ◽  
Quantum Point Contact ◽  
Linear Regime ◽  
Trade Off ◽  
Quantum Point ◽  
Thermoelectric Heat

The trade-off between large power output, high efficiency and small fluctuations in the operation of heat engines has recently received interest in the context of thermodynamic uncertainty relations (TURs). Here we provide a concrete illustration of this trade-off by theoretically investigating the operation of a quantum point contact (QPC) with an energy-dependent transmission function as a steady-state thermoelectric heat engine. As a starting point, we review and extend previous analysis of the power production and efficiency. Thereafter the power fluctuations and the bound jointly imposed on the power, efficiency, and fluctuations by the TURs are analyzed as additional performance quantifiers. We allow for arbitrary smoothness of the transmission probability of the QPC, which exhibits a close to step-like dependence in energy, and consider both the linear and the non-linear regime of operation. It is found that for a broad range of parameters, the power production reaches nearly its theoretical maximum value, with efficiencies more than half of the Carnot efficiency and at the same time with rather small fluctuations. Moreover, we show that by demanding a non-zero power production, in the linear regime a stronger TUR can be formulated in terms of the thermoelectric figure of merit. Interestingly, this bound holds also in a wide parameter regime beyond linear response for our QPC device.

Performance analysis of a tunneling thermoelectric heat engine with nano-scaled quantum well

2014 ◽  
Vol 117 (3) ◽  
pp. 1031-1039 ◽  
Author(s):  
Xiaoguang Luo ◽  
Nian Liu ◽  
Jizhou He ◽  
Teng Qiu
Keyword(s):  
Performance Analysis ◽  
Quantum Well ◽  
Heat Engine ◽  
Thermoelectric Heat

scholarly journals A theoretical study on the performances of thermoelectric heat engine and refrigerator with two-dimensional electron reservoirs

2014 ◽  
Vol 115 (24) ◽  
pp. 244306 ◽  
Author(s):  
Xiaoguang Luo ◽  
Jizhou He ◽  
Kailin Long ◽  
Jun Wang ◽  
Nian Liu ◽  
...  
Keyword(s):  
Theoretical Study ◽  
Heat Engine ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Thermoelectric Heat

Near-field scanning optical microscopy

1986 ◽  
Vol 44 ◽  
pp. 642-643
Author(s):  
E. Betzig ◽  
A. Harootunian ◽  
M. Isaacson ◽  
A. Lewis
Keyword(s):  
Near Field ◽  
Optical Microscope ◽  
Visible Radiation ◽  
Field Methods ◽  
Optical Elements ◽  
Optical Region ◽  
Order Of Magnitude ◽  
Nondestructive Imaging ◽  
Scanning Optical Microscopy ◽  
Near Field Scanning

In general, conventional methods of optical imaging are limited in spatial resolution by either the wavelength of the radiation used or by the aberrations of the optical elements. This is true whether one uses a scanning probe or a fixed beam method. The reason for the wavelength limit of resolution is due to the far field methods of producing or detecting the radiation. If one resorts to restricting our probes to the near field optical region, then the possibility exists of obtaining spatial resolutions more than an order of magnitude smaller than the optical wavelength of the radiation used. In this paper, we will describe the principles underlying such "near field" imaging and present some preliminary results from a near field scanning optical microscope (NS0M) that uses visible radiation and is capable of resolutions comparable to an SEM. The advantage of such a technique is the possibility of completely nondestructive imaging in air at spatial resolutions of about 50nm.

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